The best and most effective composition for the average vaper. Crystal clear flavor even when combining aromas in your vape liquid. Glycerin 50% - Propylene Glycol 50%. Nicotine concentration: 20mg/ml. The vape base mixtures are based on raw materials that are strictly produced and sourced from countries of the European Union. By applying a Management System based on the International Standard ISO 9001:2008, the production of our bases is traceable, so their distribution is controlled and manageable from the laboratory to the end consumer.